scutibranchiate

from The Collaborative International Dictionary of English v.0.48

Scutibranchiate \Scu`ti*bran"chi*ate\, a. (Zool.)
   Having the gills protected by a shieldlike shell; of or
   pertaining to the Scutibranchiata. -- n. One of the
   Scutibranchiata.
   [1913 Webster]